[Amps] 30M noise problem (OT?)

[Jim Barber]

Looking at only the spectral display it's a fair match for a regular 
enemy of mine - the Variable Frequency Drive motor (VFD) in any number 
of newer front-load washing machines, air conditioners, etc.

Have you or a close neighbor bought any new appliances lately? I can't 
use HF hardly at all when the XYL is running the washer, and the antenna 
in question isn't all that close to it.

Regards,
Jim, N7CXI

DAVE WHITE wrote:
> Hi Jerome
> 
> Can you post a WAV file to the website?
> 
> Try emailing Clint KA7OEI - is address is at http://www.ka7oei.com/email.html 
> 
> I had (and still do have) a problem with some sort of power line discharge type noise from HT power lines near our house.  It's a sort of 50hz based spark type noise arranged as if it's three phase but there's a pulse-pulse-gap-pulse-pulse-gap patter which makes me think it's a 3-phase delta wired device with a crapped out insulator.  I never did find it, so tried building the line synchronous noise blanker that's on Clint's website.  (It didn't help BTW)
> 
> Clint knows a lot about this stuff and may be able to analyse a wav sample for you.
> 
> Alternatively download a copy of cooledit pro from bit torrent and analyse the waveform - it may give a clue
> 
> Hope this helps
> 
> Dave G0OIL
> 
> 
> --- On Tue, 20/4/10, jerome schatten <romers at shaw.ca> wrote:
> 
> From: jerome schatten <romers at shaw.ca>
> Subject: [Amps] 30M noise problem (OT?)
> To: "Amps" <amps at contesting.com>
> Date: Tuesday, 20 April, 2010, 20:06
> 
> Here's the admittedly weak connection between my Amplifier and my 30M
> receiving noise problem: The noise coming NOT from my trusty old 813's,
> but somewhere else, is so bad it makes no sense to use the Amp as I
> can't hear weak returning signals through the noise.
> 
> I know it's a stretch, but there is such a rich collection of talent on
> this list across so many fields, that I couldn't resist tapping into it.
> 
> If you care to have a look, there are three spectrum scope photos of my
> 30M noise along with some verbiage that describes the situation.
> 
> http://www.ehpes.com/noise/noise.html  will get you to the photos.
> 
> Thanks for any ideas about what the culprit might be!
> 
> Jerome - va7vv 
> 
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